There might be a slight delay in the payment service, it needs 1-3 confirmations (depending on the crypto currency of choice). If you have credits, it shouldn't give you an error.
What do you need to be explained? We send SMS that has the ability to be spoofed. Happy to help!
I refer to the first post that it needs 1-3 confirmations (depending on the Cryptocurrency of choice). Sometimes our payment provider halts for a few minutes. I've checked all logs and everyone's payment has been successful.